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2 heads better than 1 - power porting E7TE iron.

General engine tech -- Drag Racing to Circle Track

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MadBill
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Re: 2 heads better than 1 - power porting E7TE iron.

Post by MadBill » Sun Feb 10, 2019 11:08 am

Aces! After forty pages it would be a great shame for this thread to not play out. :)
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Re: 2 heads better than 1 - power porting E7TE iron.

Post by Carnut1 » Sun Feb 10, 2019 12:15 pm

Add the 46 pages of the 289 head thread!
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Re: 2 heads better than 1 - power porting E7TE iron.

Post by GARY C » Sun Feb 10, 2019 9:17 pm

Carnut1 wrote:
Sun Feb 10, 2019 12:15 pm
Add the 46 pages of the 289 head thread!
Does DV know the forum is back up?
Please Note!
THE ABOVE POST IN NO WAY REFLECTS THE VIEWS OF SPEED TALK OR IT'S MEMBERS AND SHOULD BE VIEWED AS ENTERTAINMENT ONLY...Thanks, The Management!

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Re: 2 heads better than 1 - power porting E7TE iron.

Post by MadBill » Sun Feb 10, 2019 9:33 pm

I sent him an e-mail note.
Felix, qui potuit rerum cognscere causas.

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Re: 2 heads better than 1 - power porting E7TE iron.

Post by In-Tech » Fri Mar 08, 2019 5:14 am

Even though I couldn't give two shits less about an E7 head, this is all still great information for the masses. I do look forward to updates.
Heat is energy, energy is horsepower...but you gotta control the heat.
-Carl

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Re: 2 heads better than 1 - power porting E7TE iron.

Post by brentry » Tue Mar 24, 2020 7:59 pm

Hello

I needed some e7te advice ,so came here.

I bought a b cam and 1.72 rockers and what also was included was some e5te heads. When I got home I noticed they had 194/160 valves.
I never have flowed a e5 or e7te heads. So I figured cool , big valves. Let's see what they do.
And if any good. I will throw them on my kids 302
I had 0 interest in the heads. Till I saw the valves
So i thru them on the bench..

Absolutely no porting. Think pinch like 1.5ish
I thought the vj was a joke. And figured 170ish cfm

If any one is interested I will add to this.
I thought I could do better. I more of a LS/sbc guy.
I ended doing better(after alot of work) i also flowed a stock e7te head
Just so I could see a baseline.
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Re: 2 heads better than 1 - power porting E7TE iron.

Post by Daniel Jones » Tue Mar 24, 2020 9:36 pm

> Absolutely no porting. Think pinch like 1.5ish

So the 200 CFM @ 0.500" is just the larger valves, not your work? How did the exhaust side flow?

I bought an unfinished project truck with a rebuilt 289. The short block was done well but with poor choices on the intake (Offenhauser Equa Flow 360), heads, compression ratio and cam. The heads are D8OE heads with large 69cc chambers and exhaust ports blocked by large thermactor bumps. However, someone milled and drilled them for screw in studs and guide plates, did the guides, installed 1.9"/1.6" valves, decent springs and Comp Cams roller tip rocker arms. As near as I can tell, no port or bowl work was done. I've wondered what they would flow with some bowl work and the exhaust bumps ground out but, on the 289, the compression would still be too low.

> If any one is interested I will add to this.

Yes, please.

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Re: 2 heads better than 1 - power porting E7TE iron.

Post by brentry » Tue Mar 24, 2020 9:53 pm

I didnt flow exhaust yet. Was working on intake side. Not my work in pics above or below
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Re: 2 heads better than 1 - power porting E7TE iron.

Post by brentry » Tue Mar 24, 2020 10:07 pm

I wouldn't think bigger valves would flow well with no port work. Kinda why I posted

Here is same port with same 1.94 valve. that I ported . sort in development stsge.1.89 pinch. This head isnt easy.
Spent alot time trying get it to turn.tried alot top cuts to.
I didn't trim my guides completely down .
Also stock e7te on my bench that some one blended seat in .looks like.
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Re: 2 heads better than 1 - power porting E7TE iron.

Post by brentry » Tue Mar 24, 2020 10:12 pm

Wasnt planning on porting these. Just was a package deal that sparked my interest

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Re: 2 heads better than 1 - power porting E7TE iron.

Post by travis » Thu Mar 26, 2020 8:58 am

200 cfm at .500” lift is actually pretty good for these heads with no porting. I think the stock 1.78” intake valve is a pretty serious choke...I’ve got a set of E5AE’s that I have WAY too much time in the flow 177/153@.500” with the stock 1.78/1.45 valves. Stock they was like 155/106 iirc. Unfortunately with these I think even a 1.94” would be pointless. There is a large thin lump in both ports on the common wall that is right in the way of airflow. I’m going to try some undercut 1.84/1.50’s...one of these days

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Re: 2 heads better than 1 - power porting E7TE iron.

Post by brentry » Fri Mar 27, 2020 11:09 pm

I ended up hitting water .before I found more flow.
These heads are just to thin

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Re: 2 heads better than 1 - power porting E7TE iron.

Post by Carnut1 » Sat Mar 28, 2020 9:24 am

brentry wrote:
Fri Mar 27, 2020 11:09 pm
I ended up hitting water .before I found more flow.
These heads are just to thin
Sorry I missed this, exhaust side of intake port near ssr?
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Re: 2 heads better than 1 - power porting E7TE iron.

Post by BigBro74 » Sat Mar 28, 2020 12:07 pm

Last week in a conversation with my machinist (before brentry brought this up)(before stay at home...) we were just talking about how when he was younger that putting those Chevy valves in a sbf was standard procedure to get them to run , and he did it all the time- he is a ford enthusiast. I’ve not flowed one to know the difference but suspect it would work pretty well on a running engine. I’ve used them on aftermarket sbf heads, but not on ford castings ever. I would be curious as to what type angles those were cut into the throat? 200 is pretty good for those-
Thanks - Jason

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Re: 2 heads better than 1 - power porting E7TE iron.

Post by brentry » Sat Mar 28, 2020 2:03 pm

Carnut1 wrote:
Sat Mar 28, 2020 9:24 am
brentry wrote:
Fri Mar 27, 2020 11:09 pm
I ended up hitting water .before I found more flow.
These heads are just to thin
Sorry I missed this, exhaust side of intake port near ssr?
Yup. Right in there somewhere

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